python3-distupgrade used removed method ConfigParser.readfp

[Stephan Seitz]

Bug report was not created from the system where I discovered the bug. I discovered the bug in a Noble rescue session.

Noble switched Python system interpreter to Python 3.12 (https://docs.python.org/3/whatsnew/3.12.html#configparser). python3-distupgrade (https://packages.ubuntu.com/noble/python3-distupgrade) uses ConfigParser.readfp in /usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeController.py . This will cause "Repair packages" in Noble rescue system to fail.

Suggested fix is to use ConfigParser.read_file as suggested in Python 3.12 release notes.

Related:
https://bugs.launchpad.net/hplip/+bug/2028001

Below automatically collected info is wrong. I encountered the bug in a Noble 24.04 system while trying to debug the missing libmtdev1t64 in https://packages.ubuntu.com/noble/libinput10 (I removed network-manager while resolving the package conflicts)

ProblemType: Bug
DistroRelease: Ubuntu 23.10
Package: python3-distupgrade 1:23.10.14
ProcVersionSignature: Ubuntu 6.5.0-26.26-generic 6.5.13
Uname: Linux 6.5.0-26-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.27.0-0ubuntu5
Architecture: amd64
CasperMD5CheckResult: pass
CrashDB: ubuntu
CrashReports: 640:1000:125:1352000:2024-03-28 15:50:05.644506454 +0100:2024-03-28 15:50:06.644506454 +0100:/var/crash/_usr_lib_x86_64-linux-gnu_libexec_xdg-desktop-portal-kde.1000.crash
CurrentDesktop: KDE
Date: Thu Mar 28 20:39:59 2024
InstallationDate: Installed on 2021-05-16 (1047 days ago)
InstallationMedia: Xubuntu 21.04 "Hirsute Hippo" - Release amd64 (20210420)
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to mantic on 2024-03-28 (0 days ago)
VarLogDistupgradeTermlog: